Electric lamp and socket.



No. 783,645. PATENTED FEB. 28, 1905. G. G. PERKINS.

ELECTRIC LAMP AND SOCKET.

APPLICATION FILED JULY 30, 1904.

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flaw WWLo N0. 783,645.- PATENTED FEB. 28, 1905. C. G. PERKINS.

ELECTRIC LAMP AND SOCKET.

APPLICATION FILED JULY 30. 1904.

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Patented I ebruary 28, 190%..

CHARLES Cr. PERKINS, OF HARTFORD, CONNECTICUT, ASS'lGNOlt TO PERKlNS CORPORATION, OF HARTFORD, CONNECTlCUT, A CORPO- RATTON OF CONN ECTICUT.

lEILlEGTWIfi Lihlllll fitND SOCKET.

SPECIFICATION forming part of Letters Patent No. 783,64t5,datec1 February 28, 1905.

Application filed July 30, 190 i. Serial No- 213,895.

.To (1 7 7 whom, it may concern.-

Be it known that I, CHARLES Gr. PERKINS, a citizen of the United States, residingat Hartford, in the county of Hartford and State of Connecticut, have invented a new and useful Electric Lamp and Socket, of which the following is a specification.

This invention relates to a lamp and socket which are so constructed that the lamp can be quickly inserted into the socket by any one, but cannot be removed from the socket except by a person having a proper key.

The object of the invention is to provide a simple construction whereby when the lamp is screwed or otherwise thrust into position in the socket it is locked and cannot be unscrewed or drawn out until a proper key is inserted through the socket and a lockingtumbler on one part moved out of engagement with a locking-shoulder on the other part.

In each of the forms of the invention illustrated by the accompanying drawings the end of the lamp-base is provided with ratchetteeth and the bottom of the socket is provided with a spring-tumbler which yields when a lamp is screwed in, but engages the teeth and prevents thelamp from being turned out until the tumbler is moved byakey out of engagement with the teeth.

Figure 1 of the drawings shows a side elevation of a socket provided with a locking arrangement which is adapted to be'released by a flat key. Fig. 2 is a similar view with a portion of the socket broken away to show the interior and with a key thrust into the socket and effecting a release of a lamp. Fig. 3 is a view looking into this socket. Fig. a shows a side and an end view of a key that is adapted to unlock the lamp from this socket. Fig. 5 shows a section of a socket provided with a locking arrzmgement that is adapted to be released by a bite-key with the key turned into the position necessary to unlock the lamp. Fig. 6 is a sectional view ot the same with a lamp-base screwed into the socket and the key 111 the position occupied when the parts are locked together. Fig. 7

is a view looking into this socket. Fig. 8 is a view looking at the end of the base of the lamp, and Fig. 9 shows the key used with this latter form of lamp.

The contact parts in the socket and on the base of the lamp illustrated aretormed as usual. The tumbler in the bottom of the socket l is a yielding yoke-shaped piece 2, preferably made of phosphor-bronze, with a downwardly-projecting lug 3 and an outwardly-extending car t. ltatchet teeth 5 are so lormed on the end of the lamp-base (-3 that when the base isscrewed into the socket the yoke will yield and allow the teeth to pass under the lug; but when an attempt is made to turn the base in the opposite direction after it has been once turned in the lug will engage the teeth and hold the base from turning. The car on the yoke extends outwardly into position to be engaged. by the beveled end of a key 7, that is adapted to be thrust through the opening 8 into the socket. This key is shaped as is necessary to lit the opening through the socket, and when pushed in its beveled end engages the ear in v such a way as to lift the yoke and raise the lug above the teeth on the end oi the base, so that the lamp may be unscrewed and removed from the socket. Until this key is thrust in the lamp cannot be unscrewed, For the lug on the yoke engages one of the ratchet-teeth on the base.

l 'l .it desired, the yoke-shapml tumbler 9 may be provided with an ear ll), that is adapted to be engaged by a bite-key 11 for causing the lug to be lifted out of engagen'ient with the teeth on the end of the lamp-base. as shown in Fig. in this Form until the key is inserted the yoke springs down, so that the lug engages the teeth. When the key is inserted and turned, the bite lifts the yoke and the lug out 01'' the path of the teeth on the base, so that the lamp can be unscrewed.

The size, shape, and arrangement of the teeth on the base ol the lamp and the lug on the yoke are immaterial and may be reversed, it desired, the invention being present ii any term of tooth or shoulder on one part is ar-- tooth on the other part.

The invention claimed is- 1. The combination of a lamp having a series of ratchet-teeth on the end of its base, and a socket having a tumbler adapted to engage the ratchetteeth when the base is inserted into the socket and an opening through the wall allowing the insertion of a key for moving the tumbler from engagement with the ratchet-teeth on the end of the base, substantially as specified.

2. The combination of a lamp having a series of ratchet-teeth on the end of its base, a socket having a spring-tumbler adapted to engage the ratchet-teeth when the base is inserted into the socket and an opening through the wall allowing the insertion of a key for moving the tumbler from engagement with the tially as specified.

3. -A lamp-sockethaving a spring-tumbler arranged to be thrust longitudinally of the socket toward the base of a lamp and an opening through the side wall of the socket for the insertion of a key for moving the tumbler, substantially as specified.

4:. A lamp having a base that is adapted to be screwed into a socket and that is provided with a series of ratchet-teeth on the end of the base, which teeth are adapted to engage a tumbler in the socket, substantially as specified.

CHARLES G. PERKINS.

Vitnesses:

ETHEL M. Lown, HARRY R. TILLIAMS.

' ranged to engage any form of shoulder or l ratchet-teeth on the end of the base, substan 2O 

